web_domain table question

In the web_domain table I found traffic_quota_lock but this option is not in the control panel, it's working in the current stable release 3.0.3.3?I mean can we lock traffic over quota?? I'm not sure but I remember that ispconfig lock over quota, right?

The field in the database is set by the ispconfig cron script when a traffic lock occured, it is a invisible status field for the cron script and for that reason it is and shall not be visible in the interface.